Table 1

Neurophysiological parameters for the split-hand syndrome

ValueSensitivity (%)Specificity (%)Control populationRef.
Based on CMAP
APB/ADM<0.64091.0DC4
ADM/APB>1.751.099HC5
ADM/APB>1.758.195HC6
FDI/ADM<0.93463DC4
APB/ADM FDI/ADM<0.6 and <0.92094DC4
Based on split index
SI CMAP<5.27480DC3
SI CMAP<6.46280DC14
SI FP≤80.781.297.0HC7
SI MUNIX≤9.485.079.5HC10
  • ADI, abductor digit minimi; APB, abductor pollicis brevis; CMAP, compound muscle amplitude potential; DC, disease controls; FDI, first dorsal interosseous muscle; HC, healthy controls; MUNIX, motor unit number index; SI FP, split index from F-wave persistence.